Peter Barnes, Jonathan Rowe, and David Bollier, "The State of the Commons" - a 32-page public education introduction to the commons for general readers. The document is cast as an "annual report to commoners" -- the analogue of a corporate annual report -- that documents how the commoners' shared wealth is being managed and mismanaged, http://bollier.org/sites/default/files/State%20of%20the%20Commons.pdf.
George Caffentzis, A Tale of Two Conferences: Globalization, the Crisis of Neoliberalism and the Question of the Commons, The Commoner, http://www.commoner.org.uk/?p=96. (This essay draws an important distinction between a commons created to serve capitalist development and what might be thought of as the anti-capitalist commons).
David Bollier, "This Land Is Our Land," a 45-minute video, produced by the Media Education Foundation of Northampton, Mass., a nonprofit that produces politically progressive films for the higher ed market. A streaming version of the film is available at http://www.mediaed.org/cgi-bin/commerce.cgi?preadd=action&key=146
David Bollier, "The Commons Rising" a companion public-education report that focuses on the many positive commons developments going on. This is now quite outdated, but it gives a nice sense of the range of constructive commons-based activity going on, http://bollier.org/sites/default/files/State%20of%20the%20Commons.pdf.
David Bollier, a four-part online course on the commons will debut in a few weeks at the UN Institute for Training and Research website, (Link soon.)
Recent Additions
General Background on Commons
How Occupy Movement Might Apply Commons
http://thefutureofoccupy.org/2011/12/12/sage-advice-for-occupy-from-nobel-winner-elinor-ostrom/
Articles about 15-M by Spanish thinker Amador Fernández-Savater
Background Materials on Rio+20 UN Conference on Sustainable Development
People's Summit portal
People's Summit Occupy the Earth Summit Initiative
More on the Commons from other sources